Keep your phone. Save money. Switch to SIM Only with Olimit and start saving today.
Compare the best SIM Only deals now and see how much you could reduce your monthly bill.
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Use our filters to find the perfect plan — adjust data, contract length, and price to match your needs and budget.
Need help deciding? Explore our guide to getting a UK SIM card and see how SIM Only compares to a phone contract.
Olimit Tips & Tricks
How do I switch SIM only deal and keep my number?
1. Choose your new SIM Only deal
Compare the best SIM Only plans from top UK mobile networks. Once you find a deal that fits your needs, click through to the provider’s website to place your order.
2. Get your PAC code to keep your number
Want to keep your existing mobile number when switching networks? Text PAC to 65075 to get your code instantly — it’s quick, free, and works on all major UK networks.
3. Transfer your number to your new SIM Only plan
After signing up for your new SIM Only deal, give your PAC code to your new network. This will begin the number transfer process and automatically cancel your old contract. In most cases, you can enter your PAC code during checkout when switching SIM Only deals online.
Why is my SIM Only contract price increasing?
SIM Only plans often go up in price once a year — usually around March or April. These mid-contract price hikes used to follow the Consumer Price Index (CPI), but Ofcom now requires mobile networks to clearly state any increases in pounds and pence in your contract.
Not happy with the change?
Check when your current contract ends and set a reminder to switch. If you’re unsure about your status, text ‘INFO’ to 85075 — this free service will tell you whether you’re still in contract and if you can switch providers without paying an early exit fee.
Ready to switch?
Compare the best SIM Only deals at Olimit and take back control of your mobile bill.
Provider
Network
Data
Price
Contract Length
Roaming
Additional
Mozillion SIM Only
41 Roaming Destinations
0.5GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
5GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
Mozillion SIM Only
41 Roaming Destinations
0.5GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Mozillion SIM Only
41 Roaming Destinations
0.75GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
Lyca Mobile Sim
30 Roaming Destinations
5GB
🇦🇹 Austria
🇧🇪 Belgium
🇧🇬 Bulgaria
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇩🇪 Germany
🇬🇷 Greece
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇹 Italy
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇲🇹 Malta
🇳🇱 Netherlands
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇴 Romania
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇸🇪 Sweden
Lebara SIM Only
for 3 Months,
37 Roaming Destinations
5GB
Austria 🇦🇹
Belgium 🇧🇪
Bulgaria 🇧🇬
Croatia 🇭🇷
Cyprus 🇨🇾
Czech Republic 🇨🇿
Denmark 🇩🇰
Estonia 🇪🇪
Finland 🇫🇮
France 🇫🇷
Germany 🇩🇪
Gibraltar 🇬🇮
Greece 🇬🇷
Guadeloupe 🇬🇵
Guyane (French Guiana) 🇬🇫
Hungary 🇭🇺
Iceland 🇮🇸
India 🇮🇳
Ireland 🇮🇪
Italy 🇮🇹
Latvia 🇱🇻
Liechtenstein 🇱🇮
Lithuania 🇱🇹
Luxembourg 🇱🇺
Malta 🇲🇹
Martinique 🇲🇶
Mayotte 🇾🇹
Netherlands 🇳🇱
Norway 🇳🇴
Poland 🇵🇱
Portugal 🇵🇹
Réunion 🇷🇪
Romania 🇷🇴
Slovakia 🇸🇰
Slovenia 🇸🇮
Spain 🇪🇸
Sweden 🇸🇪
iD Mobile SIM Only
50 Roaming Destinations
30GB
🇦🇹 Austria
🇦🇿 Azerbaijan
🇵🇹 Azores
🇧🇾 Belarus
🇧🇪 Belgium
🇧🇬 Bulgaria
🇪🇸 Canary Islands
🇭🇷 Croatia
🇨🇾 Cyprus
🇨🇿 Czech Republic
🇩🇰 Denmark
🇪🇪 Estonia
🇫🇮 Finland
🇫🇷 France
🇩🇪 Germany
🇬🇮 Gibraltar
🇬🇷 Greece
🇬🇵 Guadeloupe
🇬🇬 Guernsey
🇬🇫 Guyane (French Guiana)
🇭🇺 Hungary
🇮🇸 Iceland
🇮🇪 Ireland
🇮🇲 Isle of Man
🇮🇹 Italy
🇯🇪 Jersey
🇰🇿 Kazakhstan
🇱🇻 Latvia
🇱🇮 Liechtenstein
🇱🇹 Lithuania
🇱🇺 Luxembourg
🇵🇹 Madeira
🇲🇹 Malta
🇲🇶 Martinique
🇲🇨 Monaco
🇳🇱 Netherlands
🇲🇰 North Macedonia
🇳🇴 Norway
🇵🇱 Poland
🇵🇹 Portugal
🇷🇪 Réunion
🇷🇴 Romania
🇧🇱 Saint-Barthélemy
🇲🇫 Saint-Martin
🇸🇲 San Marino
🇸🇰 Slovakia
🇸🇮 Slovenia
🇪🇸 Spain
🇸🇪 Sweden
🇻🇦 Vatican City
Mozillion SIM Only
41 Roaming Destinations
0.75GB
🇫🇷 France
🇵🇹 Portugal
🇮🇪 Ireland
🇬🇷 Greece
🇵🇱 Poland
🇮🇹 Italy
🇩🇪 Germany
🇳🇱 Netherlands
🇧🇬 Bulgaria
🇨🇾 Cyprus
🇨🇭 Switzerland
🇧🇪 Belgium
🇸🇪 Sweden
🇭🇷 Croatia
🇭🇺 Hungary
🇲🇹 Malta
🇱🇹 Lithuania
🇷🇴 Romania
🇫🇮 Finland
🇨🇿 Czech Republic
🇳🇴 Norway
🇸🇰 Slovakia
🇦🇹 Austria
🇩🇰 Denmark
🇬🇮 Gibraltar
🇮🇸 Iceland
🇱🇻 Latvia
🇪🇪 Estonia
🇱🇺 Luxembourg
🇬🇵 Guadeloupe
🇸🇮 Slovenia
🇱🇮 Liechtenstein
🇬🇫 French Guiana
🇬🇬 Guernsey
🇮🇲 Isle of Man
🇯🇪 Jersey
🇲🇶 Martinique
🇷🇪 Réunion
🇸🇲 San Marino
🇫🇴 Faroe Islands
giffgaff is a UK mobile network that runs on O2’s infrastructure, giving you 99% UK population coverage and access to 5G at no extra cost. What makes giffgaff different is its flexibility — most plans are 30-day rolling goodybags with no contract and no credit check, so you can change, pause or cancel anytime.
Plans start from just £6/month and include unlimited UK calls and texts as standard. Data allowances range from 1GB all the way up to unlimited, with golden goodybag plans offering bonus extra data on top of your base allowance.
EU roaming is included on all plans at no extra cost, letting you use your allowance in 37 European destinations, subject to a 5GB fair use limit. There’s no annual price increase on any giffgaff plan, and free calls and texts to other giffgaff members are included.
giffgaff is ideal if you want O2-quality coverage without the O2 price tag, with the freedom to switch plans every month as your needs change.
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